Test 1 Flashcards
Which of the following terms is associated with seventh generation CT scanners?
-multisection scanner
-multidetector scanner
-multiple detector array scanner
-all of the above
all of the above
Which of the following x-ray beam geometries is used by modern multidetector CT scanners?
Cone
In a _____CT scanner, the x-ray tube rotates continuously around the patient as the patient travels through the gantry
Helical
Overlap occurs when the pitch is less than
1
A ring artifact usually results from:
missing data from a detector element
During the analog to digital conversion, the _____ assigns binary units to form the digital signal.
Coder
In computed tomography, the primary methods of data acquisition are:
axial and helical
In single slice CT scanning, thin collimation results in:
better resolution
Pixel size is equal to:
field of view divided by matrix size
The development of helical and continuous acquisition scanning was made possible by:
slip-ring technology
When considering detector efficiency, the measure of how well the detectors gather incoming photons is called:
capture efficiency
______ is a mathematical process that enables the spirally acquired image data to appear as individual slices.
Interpolation
Which of the following is TRUE regarding the anode side of the x-ray tube?
-it is negatively charged
-it controls the quantity of electrons
-it is composed of an alloy of tungsten, molybdenum, and rhenium
-it contains tungsten filaments
it is composed of an alloy of tungsten, molybdenum, and rhenium
The CT number of bone is closest to
+1000
Which of the following does NOT produce a transverse axial sectional image?
-computed tomography
-conventional tomography
-conventional radiography
conventional radiography
